Connecting-rod gauge and straightener



F. W. NUERWELI..

CONNECTING Ron GAUGE AND STRAIGHTENER.

APPLICATION FILED JUNE 6.1921.

Patented Feb. 28., 1922.

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CONNECTING ROD GAUGE AND STRAIGHTENER.

APPLICATION FILED :UNE 6,1921.

1,408,023, Patented Feb. 28, 1922.

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FRED W. N UERWELL, TULSA, GKLAHOMA.

CONNECTINGr-ROD GAUGE AND STRAIGHTENER. i

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Be 1t known vthat I, FRED W. NUERWELL, a citizen oi the United States, and a resident of' Tulsa, in the county of Tulsa and State of 1 Oklahoma, have invented certain new and useful mprovements in Connecting- Rod Gauges and Straighteners, of which the ol lowing is a specification.

This invention relates to gauges and straighteners especially adapted for use in connection with the connecting rods of intern al combustion engines.

An important object of this invention 1s to provide a gauge having novel means where'- by it might be ascertained if the longitudinal axis of the wrist pin bearing or bushing is parallel to the longitudinal axis of the sectional bearing which receives the crank of the crank shaft.

Further, the invention aims to 'provide means whereby it maybe readily ascertained if the rodis twisted or bent.

Other objects and advantages of the 1nvention will be apparent during the course of the following description.

In the accompanying drawings Figure 1 is a plan-view of the device,

Figure 2 is a side elevation of the same in use ligure 3 is an end elevation of the same,l

Figure 4 is a vertical transverse sectional view through the same.

In the drawings the numeral 5 designates a base having its upper side provided with integral spaced parallel upstanding anges 6 which not only serve as a means Jfor reinforcing the base but as abutments for pairs of clips S-employed for anchoring a carriage generally designated by the numeral 10 in position. n

With reference to Figures 1 and 2it` will be noted that the base 5 is provided with yup-V standing shoulders 12 having V shaped notches 13 for receiving a mandrel 14:, the said mandrel being extended through the sectional bearing 15 of a connecting rod 16. The connecting rod 16 always assumes the same horizontal position since the mandrel 1e occupies a predetermined position by reason of its contact with the inwardly inclined faces of the pair of notches 13. Furthermore, rods of various sizes will be caused to assume a predetermined position by reason of the contact of the cylindrical mandrel 14 with the inclined faces of the notches 13. Of course a mandrel of a certain size is em- Specification of Letters Patent. Patented Feb. 28, 19222.

Application filed June 6,

1921.v Serial No. 475.253'.

ployed for each size connect-ing rod and in use the mandrel is of a size to snugly lit in the connecting rod bearing. Y

The mandrel 14 is securely held in enga gement with the shoulders 12 by means of upstanding arms 18 secured to the base as indicated at 19` and drawn into engagement with the mandrel by means 'of nuts 2O threaded on bolts 21, the bolts being threaded into the adjacent end of the base.

The carriage 10 is provided with a pair of spaced parallel side' walls y23 deining a passage vthrough which the shank of the connecting rod extends. As illustrated in Figure 1, the head 2410ithe connecting rod receives a bushing 25 whi ch in turn receives agwrlst pin 26. As iswell known, the wrist pln 26 extends beyond the ends ofthe bushing 25v and is adapted to be received within spaced aligned bushings in a piston'so as to connect the piston to the connecting rod in such a manner that the piston may partake of a rocking motion with relation to the'rod.

The ends of the side walls 23 adjacent the wrist pin are formed with notcheshaving horizontal walls 28 arranged in the same plane and adapted to be engagedby the end portions of the wrist pin. i If the end i ortions of the wrist pin rest llatly on the horizontal walls 28 the operator will know that the rod is not twisted. On the other hand, -ifthe end portions of the wrist pin do not flatly contact with the horizontal walls 28 he will know that the rod is twisted andthe approximate extent of the twist.

y The notches above referred to are also provided with vertical walls 30 arranged at right angles to the walls 28 and forming a means to indicate if the longitudinal axis of the wrist pinV 26 is parallel to the longitudinal axis of the sectional bearing;-y It frequently occurs that the bushing 25 is im'- properly seatedA in the head 24 or that the wrist pinis improperly seated in the bushing 25 and in either case the wrist pin will notv be exactly parallel to the axis ofthe sectional bearin'g. The carriage 10 may be :moved along the base so that theevertical Ywalls of the notches or recesses will be presented to the end portions of the wrist pin f 26. Should the end portions of the wrist pin flatly contact with both of the vertical walls it will indicate that the wrist pin is in the same plane with the sectional bearing 15. On the other hand, if only one end portion of the wrist pin flatly contacts with one of the vertical walls 30 it will indicate that the wrist pin is not in the same plane with the sectional hearing, whereupon the operator may proceed to make the necessary adjustment or replacement as the case may be. With reference to Figures 3 and 4, it will he noted that the base or the carriage is formed With a longitudinal groove 34 which receives an upstanding longitudinally extending rib 36 formed on the upper side of the base.

By reason of the rib 36 which extends into the groove 34, the carriage is at all times held at right angles to the mandrel 14 so that the vertical and horizontal Walls 30 and 28 respectively Will at all times be properly presented to thewristpin.

Should it he desired to` test therod for straightness, a spacing sleeve. 36 of a proper length may be mounted on the mandrel 14 between the sectional bearing 15 and one of the upstanding shoulders 12.` After moving the connecting rod laterally7 so that it will be Hatly engaged with the sleeve 36 and so that the sleeve 36 Will loe engaged With the shoulder, a spacingv block `37 is arranged loe-- tween the head 24 and one of the side Walls 23. The spacing block 37 and the sleeve 36 is of course of a sizetocorrectly indicate the true condition of the rod With respect to straighteners. That is to say, the sleeve 36 andthe spacing or measuringhlock 37 are of a size to be used in `conjunction with a connecting rod of a certain size. A i

Should it be found that the redis bent, spaced series of set screws 40 threaded through the Wallsf23 may be engaged with the shank ofY the rod for the purpose of straightening the same.` It it is desired to straighten the rod near the Wrist pin the carriage is moved along the hase so that the ends of the Wrist pin are received in approximately semi-circular recesses 44 in the upper sides of the side Walls 23 whereupon the screws 40 may be engaged with the rod at a pointclose to the Wrist pin.

The carriage 10 is securely held in anadj usted position by means of the clips 8y Which extend into grooves 47 in the opposite sides of the carriage and Which are held in position by means of cap screws 48 threaded into the base.

Having thus described the invention, what is claimed is A l 1. Aconnecting rod straightening device comprising a hase having upstanding shoulders formed With kV shaped notches, a Inandrelcontacting with the Walls' of said notches and adapted to he extended through a conthe opposite sides of said rod whereby to straighten the rod, and means to secure said carriage in an adjusted position.

3. A connecting rod straightener comprising a hase having upstanding end portions, a mandrel engaging said end portions and adapted for supporting the sectional hearing of a connecting rod, a carriage slidable on said hase and having upstanding side Walls defining a groove adapted for the reception `of the shank of a connecting rod, and set screws carried hy said side Walls andnextend* ing into said groove for engaging the shank of a connecting rod and straightening the same. v a j 4. AY connecting rod straightener comprising a hase having upstanding end portions, a vmandrel engaging said end portions and adapted for supporting the sectional bearing of a connecting rod, a carriage slidahle on said hase and having'upstanding side Walls delining a groove adapted for thereception of the shank of a connectmgrod, and set screws carriedA by said side Walls and extending into said groove for engaging the i shanlrof a connecting rod and straightening the same7 said side walls being provided with Wrist pins receiving recesses adjacent Vsaid set screws. y

5. A connecting rod straightener compris ing a' base having upstanding end portions,

a mandrel engaging said end portions and adapted for supporting the sectional bearing of a connecting rod, a carriage slidable on said hase and having upstanding'side Walls defining a groove adapted orthe reception` of the shank of a Vconnecting rod, set screws carried `by said side walls and extend ing into said groove for engaging the shank of a connecting rod `and straightening the saine, and' means' to holdsaid mandrel in en# gagement with the upwardly extended end ,portion of said hase.

j FRED vv. NUERWELL. 

